A gallery of complex polyhedra with descriptions and characteristics.

Learn more about platonic sold geometry, understand the platonic solid names, view some solved examples, and try your hand at some interactive problems.

Use this site to discover how we represent higher dimensional objects in mathematics and how one might draw a four dimensional object on two dimensional paper and modeling fourth degree tetrahedron.

Interactive resources and activities dealing with properties and characteristic of the five polyhedrons and the sphere.

Use Euler's Formula and properties of known platonic solids' faces, edges, and vertices to determine why only five platonic solids exist.

A short interactive activity to visualize the different platonic solids. You can also change the axis of rotation.

Test your geometry aptitude using this interactive matching game. Match pictures and symbols to the correct definition. Answers are verified immediately. Winners can earn as much as 10,000 dollars and have their name posted for the day.

Drawings and discussion on the properties of the cube, with lots of links to related pages. With this page you can find how to make a cube out of tetrahedron.

"What is so fascinating about bubbles? The precise spherical shape, the incredibly fragile nature of the microscopically thin soap film, the beautiful colors that swirl and shimmer, or most likely, a combination of all these phenomena?...

This question and answer site provides a lot of basic information about polyhedra. The five regular polyhedra, "The Platonic Solids," are described.

An informative resource on the nature of Platonic Solids and what constitutes these figures.

A brief site that includes some activities to understand the figures.

At this one page website a variety of polyhedra are shown. The challenge is to create the skeleton for each polyhedron and identify the needed materials. You can check your solution right at the website.

Predict which solid shape constructions would be unstable as shown at this one page website. Solutions are available right at the website.

[Free Registration/Login Required] In this flipchart, students explore geometric sense by interacting with plane diagrams that create a three-dimensional shape.

This question and answer site from The Math Forum with Dr. Math discusses the angle between two adjacent faces of an octahedron. Links are also provided for additional information on related subjects.

An image of New Hampshire Industrial Products.